[TechAssist] Re: Sony KP53S15
- From: "Damon" <DamonEB@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 16 Dec 2005 00:20:33 -0500
Well FIRST...IF you disconnect the IHVT's wire from the SPLITTER, you're
losing the feedback regulation on MOST Sony PTV's.......
See that little gray wire coming off the Splitter? There's your
feedback/regulation wire...NEVER EVER DISCONNECT THAT WIRE AND FIRE UP THE
PTV...unless you like Blown CRTs.
Since you probably removed the IHVT's wire from the splitter the CRTs should
be ok.
Next, re-install the IHVT's HV wire, get out your scope, monitor the gray
wire's maximum voltage level and compare it to the dc levels on the feedback
line, OR you can check the pre-drive circuits on the HV output circuit.
NO Feedback, no regulation......
Damon B
Telrad Electronics
Fort Wayne IN
----- Original Message -----
From: <bgrabowski@xxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, December 15, 2005 1:15 PM
Subject: [TechAssist] Sony KP53S15
> Anyone have a fix for a Sony KP53S15 that is in shutdown. HV comes up
> and then immediate shutdown. The B+ is right on at 135v and after
> taking 2nd anode lead off
> it will arc to ground almost 4 inches and burys the HV meter at over
> 40KV. Is there any common fault for this set. The 2 damper diodes test
> okay and the 2 critical caps are on the money any help would be
> appreciated. Thanks
>
>
> Bill G.
>
> Bill Grabowski
> Triangle Appliance
> Kenosha,WI 53142
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